Remove prune from .travis.yml

Author: stefvhuynh

.travis.yml

@@ -3,16 +3,12 @@ language: node_js
 node_js:
   - "4"
   - "6"
-  - "8"
 
 branches:
   only:
     - master
 
 script:
   - npm run lint
-
-  # Prune deps to just production and ensure we can still build
-  - npm prune --production
   - npm run build
   - npm run umd